Philippine boxing great Manny Pacquiao plans to fight again in September, with
the bout likely to be in Asia to avoid high taxes in the United States.

Negotiations are ongoing for a rematch with Mexican Juan Manuel Marquez, who knocked Pacquiao out in his last fight in December, although the opponent and the venue are yet to be finalised.

Promoter Bob Arum – who will bring double Olympic gold medallist Zou Shiming to Macau this month – has been planning to showcase Pacquiao in the Asia market as the great fighter's career comes to its final stages.

"The fight is definitely in September. We will talk about the opponent and the place after the May 13 elections," Rose Tamayo, Pacquiao's spokesperson said.

Pacquiao, 34, is running for re-election as a congressman in next month's Philippine midterm elections, and he is currently on the campaign trail.

Singapore is one of the top places for consideration for September with the giant Venetian Hotel in Macau also a possibility as Arum tries to entice Juan Manuel Marquez to have a fifth fight with Pacquiao.

Pacquiao has won an unprecedented eight world titles in different weight divisions, and was until recently regarded by many as the best pound-for-pound boxer.

But Pacquiao lost his World Boxing Organization welterweight crown in June last year in a controversial points decision to US fighter Timothy Bradley, then suffered his shock knockout defeat to Marquez.

His losses prompted calls for him to retire, but Pacquiao has consistently signalled his intention to keep on fighting.

Pacquiao's sporting achievements lifted him and his family out of deep poverty, as he became one of the highest paid sportsmen in the world.

He translated his boxing success into the political ring, winning a seat in the nation's lower house of parliament in 2010 as a congressman for Sarangani Province.

Pacquiao is running for re-election unopposed in the May polls, while seeking to create a family dynasty with his wife and brother also running for political posts in the May elections.